Attachment for sewing machines



April 8 1924. 1,489,392

A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Oct. 4. 1917 6 Sheets-Sheet 2 /5 Z; 47% I i 9 #77 V v 7/ E 4 9 I 95 60 so I v 1 \63 Inventor Apfil s 1924. I 1,489,392

A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Oct. 4, 1917 6 Sheets-Sheet 5 April 8, 1924- v 1,489,392

A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES OgiginaL Filed Oct. 4 1917 6 Sheets-Sheet 4 Inventor: 1

April 8, 1924. v 1,489,392

A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Oct. 4 1917 6 Sheets-Sheet 5 April 8 1924. 1,489,392

A. B. MATTINGLY I ATTACHMENT FOR SEWING lVIACI-IIIJES Original Filed Oct. 4 1917 6 Sheets-Sheet 6 Fig-Q5 7.

Patented Apr. 5%, 1924.

TED STATES ALBERTUS B. MATTINGLY, on NEW YORK, n. Y.

ATTACHMENT FOR SEWING MACHINES.

Substitute for application Serial No. 194,713, filed October 4, 1917. This application filed January 21, 1920. Serial No. 353,107. Renewed September 1, 1923.

To all "Ztil-O'HL it may concern Be it known that I, ALcnn'rUs B. MAT- TINGLY, a citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Attachments for Sewing Machines, of which the following is a specification This invention relates to an improvement in attachment for sewing machines, and the inventor is aware that the device is of a nature similar to that disclosed in British Letters Patent No. 17 ,153 of 1905, to Hills, and United States Patents No. 412,081, to Fletcher, No. 446,736, to Fletcher, No. 990,601, to Seward, and No. 990,610 to Turck, and the object is to overcome some of the objectionable features-of these devices and to further improve the same.

This application is a substitute for application Serial Number 194,713, filed October 4, 1917.

The principal objects are to provide a device of this character to automatically cut or slit the cloth just in advance of the stitching or binding of the button-hole so that the needle may pass alternately through the cloth and then through the slit or cut,

thus causing the thread to be brought through the out and make a perfect binding of the raw edges of the work, and to provide a means for positively actuating the knife with a quick and decisive action'at the proper periods to make the cut the proper length according to the length of the button-holes, and to have the length of cut automatically adjust itself with the adjustingof the device for the length of the button-hole.

The further objects are to provide a device of this character which will. provide a means for more evenly distributing the stitches around the contour of the buttonhole than has heretofore been accomplished, and to provide a means whereby a more perfect adjustment of the cutting device as regards its alinement relative to the needle of the sewing machine is obtained.

The still further objects are to provide a device of this character which by its construction is considerably reduced in height and thereby doing away with the necessity of removing the face plate of the sewing machine to adjust the presser bar, and by the construction of the base plate obviating the necessity of removing the feed dogs of the sewing machine.

The still further objects are to provide an improved ratchet device for effecting the lateral vibration of the work clamp, to pro duce'the overstitch of the edge of the button-hole, and to form other parts of the device by the stamping process, screw ma chines, which is the cheapest method of manufacturing devices of this class.

A still further object is to provide a device of this kind in which the knife can be adjusted to cut a line or slit in which the needle will follow with its inside lines of its vibrating motion on its forward movement and also perform the same function on its backward movement in forming or stitching the button-hole.

With these and other objects in view, it will be seen that I accomplish the foregoing, by referring to the accompanying drawings forming a part of this specification; but I do not wish to confine myself to the exact construction shown, as I have, for the sake of clear illustration, exaggerated some of the parts, especially in the side elevations, and the cam faces of the yoke upon which the eccentric cam works.

In the accompanying drawings, showing one embodiment of my invention, Figure 1 is a plan view of the device; Fig. 2 is a similar View to Fig. 1, partly broken away to show the revolving disk and the cam for moving the work clamp; Fig. 3 is a similar View to Fig. 2 with the revolving disk removed; Fig. 4 is a similar view to Fig. 3 and a section taken on line 44 of Fig. 5; Fig. 5 is a side elevation; Fig. 6 is a'sectional View taken on the line 66 of Fig. Fig. 7 is a similar view to Fig. '6, with the knife and its operating means removed; Fig. 8 is a similar view to Fig. 7, with the work clamp removed showing the vibrating means; Fig. 9 is a similar view to Fig. 8, with the vibrating means removed; Fig. 10 is a central vertical sectional view; Fig. 11 is a perspective view of the operating lever; Fig. 12 is a detail plan of the vibrator; F ig. 13 is an'end elevation of the vibrator; Fig. 14 is a side elevation of the vibrator; Fig. 15 is a perspective view of the vibrator carrier Fig. 16 is a plan of the supporting plate; Fig. 17 is a bottom plan of the revolving disk; Fig. 18 is a central section of the revolving disk;

the ratchet cam; Fig. 28 is a plan of the pawl plate of the vibrator; Fig. 29 is a plan of the'spring pawl for operating the ratchet cam; Fig. 30 is a bottom plan of the cam member showing the cam for operating the knife and the race cam for controlling the work clamp; Fig. 31 is a plan of the upper portion of the assembling stud carrying the brake springs; Fig. 32 is aside elevation of Fig. 31; Fig. 33 is a plan'of the lower portion of the assembling stud and Fi 34 is aside elevation of Fig. 33; Fig. 35 is a plan of the linkage for alining the work clamp and knife with the needle; Fig. 36 is a diagrammatic view showing the movement of the work clamp and cam when the operating cam moves in a circular motion: Fig. 37 is a view similar to Fig. 36, but showing the cam moving in an elliptical path.

I provide a suitable baseplate 1, which is secured to a rear throat plate 2 of the sewing machine in any suitable manner, but preferably screwed. thereto, as shown in Fig. 1 of the drawings.

The base plate 1 is provided with an ear 3, which is upwardly turned and carries the operating "lever 4, which rocks on a pivot 5 formed of a large screw, the lever 4 being provided with a bifurcated end 6, which engages the shank of the screw of the tightening collar of the needle bar of the sewing machine. The lever 4 is further provided with an arc-shaped slot 7, through which passes the arm of the friction clutch which receives its movement from the screw 8 in the ear 9 and the rear end 10 of the slot 7. The screw 8 is frictionally held from turning by the pressure of the spring 11 against its head and the ear 9. The lever 4 is fur ther provided with an arm or downwardex tension which has a bifurcated end 12 which operates the pawl 13 and the pawl plate 14 by the lever 15 which the bifurcated end 12 embraces, and which is mounted on the throat plate 2 by means of a body screw forming a pivot 16. In the forward end of the lever 15 is a pin 17 (see Figs. 9, 28 and 29) which operates the pawl 13'and the pawl plate'14 through the slots 18 and 19.

The base plate 1 is further provided with a pivot or stud 20 made up of two parts 21 'and'22. The lower portion 21 of the stud is hollow and has its upper and lower ends turned down, leaving a body portion 23 which is slotted on opposite sides forming rooves 24 for the reception of the extensions 25 of the part 22, and a washer 26 is forced on to the lower part of the part 21. The washer 26 forms a substantial base for holding the stud in a vertical position on the base plate, which is done by the screw 27 passing through the washer and the base plate, 1 and the hollow part 21 and being screwed into the )fllt 22, which looks all of the several parts assembled on the stud in position by its head 28, in which are secured two springs 29 which act as friction brakes in connection with the cam member 30,

'which is driven by a friction device (see 7 31 supported by a flange 32 on the cam member in the recess 33 of the ring is pivoted a friction dog 34 which is normally held in contact with cam member 30 by a spring 35. The lever '36 of the dog passes through an opening or slot 7 in the operating lever 4 and is operated by the screw and the rear end ofthe slot 7, the screw 8 forcing the dog and ring backwards and relieving the pressure on the cam member. The springs 29 hearing against the surface 37 prevent the cam member from turning and the rear end of the slot forces the dog forward and on the reverse movement of the lever 4 causes the nose 38 to bite or grip the surface 39 of cam member 30 and revolve the same a predetermined amount which is regulated by the screw'8. The plate 40 fixed on the upper face of cam 30 keeps the ring in position.

Rotatably mounted upon the stud 20 and supported by the washer 26 are the pawl 13 and the pawl plate 14 (which are swung in an are by the end 12 of the lever 4 through the lever 15 and its pin 17, in a forward and backward movement). Rotatably mounted upon the stud 20 and resting upon the pawl plate 14 is aratchet cam 41 which receives a step by step rotary movement from the upturned end 133 of the pawl 13 extending through a slot in the plate 14 and engaging in turn the notches 137 of the ratchet cam 41 and which operates the vibrator56, which has its support on the pawl plate and is pivoted on the pin 51 of the Lshaped member 52. I

The base plate 1 is further provided with a cutaway portion 43 in which is located a linked member 44 having a slot 45 and a circular opening 46 which fits the head of the screw 27 which acts as a pivot. Secured to the forward end of the linked member 44 by a pivot is a link 47 with an upturned end 48, which is tapped for the screw 49 which passes through a hole in the ear 3 and is provided with a lock nut 50. By turning the screw 49 to'pull or push the link 47, the slot 45 can be made to line up perfectly with the needle and the stud 20 and held in this position by the lock nut 50. The slot 45 is for receiving the bottom end oftlie pin 51 of the L-shaped member 52, which is provided with a slot 53 for adjusting it upon the base plate 1 by the screw 54, and it is providedwith an upturned car 55 for adjusting it while the screw 54 is loose. The pin 51 is tight in the member 52 and its upper end forms a pivot for the vibrator 56, which is connected thereto by the hole 57 in the car 58, and when assembled the ear 58 is capable of passing under the pawl 13 and pawl plate 14, while the yoke 59 straddles the ratchet cam and rests upon the pawl plate 14.

The vibrator-.56 is provided with a pivoted block 60 which fits the inner faces of the rear yoke 62 of the work clamp 63, which straddles the stud 20 and rests on the sup porting plate 61, which, working in con junction with the cam member 30, keeps the forward part 64 of the work clamp inproper contact withthe base plate land preventsthe bottom stripper plate 65 from leaving the slotted way 66 in the base as it is oscillated by the work clamp in connection with the ears 67. a

The supporting plate 61 is held in posi tion. by resting on the shoulders 68 of the bottom part 21 of the stud 20, which fits the hole 69 provided with slots through which pass the extensions 25 of the upper part 22 of the stud 20 and prevent plate 61 from turning and causing the springs 29 to act as friction brakes on the cam member 30. The screw 27 pulling down on the part 22 pinches the plate 61 between the shoulder 68 and the part 70 of the upper part 22 of the stud.

Mounted upon the yoke 62 is the guide or shield '71 for the knife carrier 72, having its front end 73 in the form of a stripping plate which slides in a groove or space 74 formed by a plate 7 5, which is forced into the upper jaw 76 of the work clamp. The rear end of the shield 71 is enlarged, forming a guide 77, by means of the downwardly extending flanges 78 fitting the yoke 62, which moves back and forth relatively to the stud 20. The rectangular opening 79 is of a width equal to the diameter of the upper part 22 of the stud 20, which passes through it and prevents the shield from moving back and forth but allows its rear end to be drawn laterally of the stud 20 in both directions by the pin 80 working in the cam groove 81 formed by the cam surfaces 82 and 83 on the under side of cam member 30 (thus causing the vibrator to vibrate or oscillate the work (31211111) in the contour of a button-hole while the revolving disk is moving the work clamp back and forth the length of the buttonhole).

Mounted upon the guide or shield 77 is the knife carrier 72, which has its spring portion 84 passingthrough the openings 85 and 86 of the shield 71. The spring portion 84 has its outer end bent upward, with two ears 87 forming a pair of jaws for the knife 88,

which is held by a pin or screw 89. The rear end of the spring portion 84 is formed in a rectangular frame or yoke 90 having a flange 91 forming a cam face 92 against which the cam 93 secured to the cam member 30 works, and the flexible portion 94 insures the keeping of the cam 93 and the cam face 92 always in contact. At a predetermined point the flange 91 forming the cam face 92 is cutaway or ends at 95, and the yoke is so formed at this point as to have a clearance space 96 to prevent the yoke frame from hitting the cam 93 when the flexible part 94- of the yoke causes the yoke and knife to. move quickly back between the strokes of the needle and thus prevent the needle bar from striking the knife several times while it is being moved back from under the needle bar. This quick movement is caused by the cam 93, which holds the yoke forward for the proper time, having an abrupt drop 97, so that while it is revolving on the stud 20 the point 98 passes the point on the cam 92. The point 98 is so formed as to not interfere with the point 95, and this allows the yoke to move back its full stroke at this point,

which is accomplished on one of the upward strokes of the needle bar.

Mounted on the top of thestud 20 and fixedly held in place by dowel pins 99 is a cam plate 100, which works in conjunction with the driving plate 101 that is secured to the cam member 30 and which causes the revolving disk 102 to revolve in the path of an ellipse relative to the stud 20 and having its major axis in line with the work clamp and its minor axis transverse therewith and the.intersection of its axes central with the stud 20. The revolving of the disk in an. elliptical path is caused by 1 its pivot pin 103 shifting its position in the slot 104 as it revolves. The shifting of the pin is caused by the pivoted cam 105 sliding in the shallow slot 106. It will be noted that the slot 104 is deeper than the slot 106; that 1 3 is to prevent the pin 103 from entering the slot 106 at the critical point when the disk 102 is being driven by the driving plate 101,

clearly understood by referring to Fig. 3, I

where I have indicated by dotted lines the positions of the pivoted cams and pins and the starting position of the driving plate for each cycle. To make a button-hole, with the driving plate in the positionindicated in dotted lines 109, the block 107 willybe at 110 and the pivot pin 103 at 111 and block 105 at 112. When the driving plate reaches the position indicated at 113 the cam 107 will be at 114 and its center will represent the end of the minor radius'of the ellipse and the block 105 willbe at 115 and thepivot pin 103 will be in the center of the cam plate. lVhile the driving plate is moving to the position shown in full lines the pivot pin 103 moves along the slot 104 to 116 and the block 105 returns to the center of the cam plate and as the driving plate continues its circular movement to the position 109 the block 105 moves over to 117 and back to the center of cam plate. Mounted upon the revolving disk is an adjustable cam 118 held in position by a stud 119 having a rectangular head 120 which fits the recess 121 and which guides it in its movement. The stud passes through a slot 122 and the cam into a screw cap 123, which causes the cam 118 to bind against the disk 102. This cam moves in an elliptical path, and the lengths of the axes are changed by the adjustment of the cam on the disk 102 relative to the pin 103. The cam 118 performs the function of the eccentric cam of the patents mentioned'in this specification and produces a more satisfactory result.

The cam 118 moves the work clamp forward and back from the stud and in line with the needle through the yoke member 124, which is'secured tothe work clamp and is provided with a slot 125 in which the cam 118 is located, and as the cam revolves it works against the face 126 first to drive the clamp forward and against the face 127 to draw the clamp back. The yoke member 124 is secured to the work clamp 63 by means of screws 128, and the forward end is bifurcated and bent so as to form bearings for the locking member 129, which is formed of a bent wire having a central portion 130 which acts in the capacity of a hand lever to operate the two end portions 131 which act upon the spring extensions 132 of the upper jaw 63 and which are riveted to the rear yoke 62 of the work clamp.

Mounted on the underside of the base plate 1 (see Figs. 8 and 9) is a spring memher 133, which is held in position by the rivets 134 and has an upwardly extending portion 135 which extends through theopening 136 of the pawl plate 14 and into the holes 137 of the ratchet cam 41. This prevents the ratchet cam from being turned backwards by friction of the end 138 of the pawl slipping out of any one of the holes 137 upon its backward movement after it h as revolved the ratchet cam one-tenth of a turn.

The base plate is further bent or formed so as to have a raised portion 139 through the center thereof, upon which the bottom of the work clamp slides and on which is cut the channel or groove 66 for the stripper plate 65, which has an opening 140 somewhat in theshape of a T. Beneath the stripper plate 65 in the base plate is an opening 141 to allow the needle to perform its function. The raised portion 139 forms a channel or groove 142 see Fig. 10), which allows the free action of the feed dogs of the sewing machine and raises the devire enough to permit the cutting of the cloth without the knife hitting the dogs on its downward stroke.

The operation of the device is very simple. The rear throat plate of the sewing machine is removed and the device is slipped in its place by the insertion of the throat plate 2 which is screwed to the device, and the shank of the screw which holds the needle in'position passes into the bifurcated end 6 of the lever 4. \Vhen the attachment is first put on the machine the screw 54 and lock nut 50 are loosened and the screw 49 turned to bring the knife in line with the needle. The lock nut 50 is then tightened up. This holds the slot 45 in a perfect line with the needle and then the member can be adjusted for any width of vibration for the work clamp. The screw 54 is then tightened and the attachment is ready for operation. It will be understood that after the knife has been once adjusted for the needle the attachment can be removed if desired and put back without the knife being readjusted, and the vibrating movement of the work clamp can also be changed to take more or less bite when the attachment is adjusted to make alarger or smaller button-hole, without disturbing the adjustment of the knife.

To make a button-hole, the work clamp is set by operating the sewing machine until the extreme back position is reached. lever 130 of the locking member 129 is then pressed forward, (that is, in the direction of the needle), and forces the ends 131 backwards andthus relieves the pressure of the springs 132, which allows the jaws of the work clamp to open. The cloth is inserted between'the jaws and the lever 130 pushed back to its original position, thus causing the upper jaw to force the cloth down into the concave opening in the lower jaw, and

at the same time the flanges 143 of the upper jaw prevent the slipping of the cloth on the lower jaw and thus causes the cloth to be stretched like a drum head. lVith the work clamp in this position the knife is in the dotted position shown in Fig. 5, and upon running the machine the needle bar strikes the top of the knife and forces it through the cloth each time the needle de scends, until the work clamp is almost at The The pin 80 is the pivot center upon which the work clamp is oscillated by the vibrator 56. lVith each upward movement of the needle bar the lever 41. is raised, which in turn swings the pawl plate 1 1 sufiiciently to have the pawl 138 act on one of the holes 137 of the ratchet cam and revolve it onetenth of a revolution, which causes one of the pointed cam faces 143 to act on one side of the yoke 59 and cause the vibrator to swing to one side on its pivot 51. The face 1 14i prevents any overthrow of the vibrator. The next stroke of the needle causes one of the faces 143 to act on the opposite side of the yoke 59 and swing it in the opposite direction. This i'novemcnt of the vibrator causes the work clamp to be oscillated on its pivot 80, such motion being transmitted through the block 60 of the vibrator. While the vibrator is oscillating the work clamp in one direction or the other with every stroke of the needle to make the needle pass first through the cloth and then through the cut, the cam is slowly shoving the work clamp forward the length of the button hole, the speed of the forward movement being regulated by the screw 8, which strikes the arm or lever 36 of the friction clutch and forces the ring 31 back a predetermined amount, (upon the downward stroke of the needle). The rear end 10 of the slot 7, upon reaching the arm 36, (on the upward movement of the needle) forces the ring to move forward and the nose 38 to bite intothe cam member 30 and cause it and the revolving disk to revolve, which causes the cam 118 to act upon the face 126 of the yoke member 12 1 and shove the work clamp forward, and when the cam, on the last half of the revolution of the revolving disk, works against the face 127 it causes the work clamp to be drawn backwards. The revolving of the cam member 30 causes the pin 80 to shift its position while the button-hole is being made. This is due to the pin 80 being held relative to the stud 20 by the groove 81 and in the start is in the portion 1-15 which forms a part of the back end of the button-hole, that is, the part which is furthest from the edge of the garment. The part 1 16 holds the pin in a position so that the vibrator will vibrate the work clamp up one side of the slit which is being made by the knife for the buttonhole to the end, and then the pin is moved by the part 147 to form the other end of the button-hole and the pin is then held in position the farthest away from the stud by the part 148 until the vibrating of the work clamp down the other side of the slit completes the button-hole by the pin going to its original position in the portion 1&5. This operation forms what is known by the trade as the straight button-hole, or a button-hole with both ends alike. It will be noted that the cam member 30 revolves an equal distance at each stroke of the needle, and if the cam 118 were attached directly to the cam member the cam 118 advantages gained by the cam 118 moving in the elliptical path instead of the circular path. In these two views I have indicated by the dotted lines 150 the move ment of the cam member 30 for every ten strokes of the needle or for every ten stitches, and the point wherefeach dotted line 150 touches the semi-circle 151 indicates where the cam 118 would be, for instance, after the first ten stitches: it would have moved from a. to Z) and the second ten stitches from b to 0 and so on until after a hundred and twenty stitches it would be at m and the first half of the button-hole would be finished, and the reverse movement would under the same conditions, while the cam 1.18 is completing the, circle, complete the button-hole. The vertical lines 152'represent the forward movement of the'cani 118 and the. horizontal lines 153 the work clamp, and the vertical lines 154 represent the forward movement of the work clamp. It will be noted that all of the lines 153 are exactly the same length in both figures, and when the cam 118 moves from a to 7) ten stitches are crowded into the space between a and 0, and when it moves from b to a ten are made in the space from 0 to p, and so on, and as the cam 118 moves from a to g each of the spaces 155 from a to t increases in length and thus it will be seen that entirely too many stitches are crowded into the space from '22. to 0 and 0 to p, while from to Q the stitches would be normal and to 7) would not have suiiicient stitches, and r to s and s to t entirely too few,and the exact reverse condition would exist while the cam 118 is moving from g to m and the clamp from t to 2. Thus it will be seen that the circular movement gives a very uneven stitching of the button-hole. By referring to Fig. 37, that the cam 118 follows an elliptical path, indicated by the line 156 and when the cam member 30 moves from an to b the cam moves from a, to Z), and when the cam member has moved to 0 the cam has moved to 0, and so on, and the clamp has moved from a to 0 while the cam member has moved from a. to L and the cam from a to b, and

lit)

it will be seen so on. It will be noted that the spaces n and y z are the same, and all of the other spaces from 0--p to a;'-y inclusive are the same, which are of the normal length for a predetermined number of stitches, it beingunderstood that I have stated for convenience of illustration that ten stitches are made between each of these divisions; but by regulating the screw 8 any number of stitches can be made between the divisions; and from the foregoing it will be clearly seen that the elliptical movement places the stitches very evenly along the sides of the button-hole and does not overcrowd the ends too much, as the space between 42 and 0 is greater than between a and 0.

1'. claim as my invention:

1. In an attachment of the character stated, the combination of stitching mechanism includinga needle bar and its needle, means for clamping work taut, means capable of travel in an elliptical path connected with said work clamp for moving the same back and forth with respect to the stitching mechanism in line with the needle, a flexible endwise movable member for supporting a cutter above the work, and a cutter fixed to said member for slitting the work as said member is flexed by the needle bar in advance of the stitching operation.

2. An attachment as described in claim 1 characterized by means for positioning the cutter in the path of travel of the needle bar for a predetermined period of time and quick return means for withdrawing the cutter from the path of travel of said needle bar.

3. An attachment as: described in claim 1 characterized by means for so oscillating the work holder as to cause the stitching mechanism to pass a thread first through the work as incisedand then through the incision and so on to provide a substantially uniform overstitehing or binding for the raw edge throughout its extent.

it. In an attachment of the character stated, the combination of stitching mechanism inchuling a needle, of a work clamp, a stud, a cam member having a driving plate retatable thereon. a c amming plate provided with slots in line with the major and minor axes of an ellipse mounted upon the stud working in conjunction with the driving plate, a disk operable by the driving plate, the disk being provided with a pin and a cam block both of which operate in the aforesaid slots of the camming plate to cause the diskto move in an elliptical path with respect to the stud and having its major axis in line with the work clamp and having its minor axis disposed transversely thereto, and a cam connected to said work clamp and operable by said disk for movement in an elliptical path for reciprocating the work clamp in line with the needle.

An attachment as described in claim at characterized by a ratchet cam mounted upon the stud, a pawl plate for advancing the ratchet, and means connecting the work clamp with respect to the ratchet cam for vibrating said clamp.

6. An attachment as described in claim 5 characterized by means for preventing backward throw of the ratchet cam.

7. An attachment as described in claim 6 characterized by avcutting device carried by the work clamp for making an incision in advance of the stitching.

8. In an attachment of the character stated, the combination with the frame and the wor: clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said v perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, and meanscapable of travel in an eliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

9. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a. central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the wor; clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respectto the stitching mechanism.

10. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having av central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the Work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the Work clamp relatively to its pivot to form a but ton-hole, and means capable of travel in an elliptical path connected with the work clamp for moving thcsame back and forth with respect to the stitching mechanism.

11. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate latera ly, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a. circular series around the center, the periphery of the cam having five faces meeting to form five points, advancng means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole, and means. capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism. 7

12. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole, means for in creasing or decreasing the overstitch or the lateral throw of the work clamp, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

18. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud. and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole, means for adjusting the vi brator relative to the stud and needle, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

14. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud andhaving a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole, means for adjusting the vibrator relative to the stud and needle, means for regulating the length of the button-hole, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

15. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stndand hav ing a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at'said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

16. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and hav ing a central perforation and ten perfora tions in a circular series around the center, the periphery'of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrats the work clamp, means for preventing time any backward throw of the perforated cam, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

17. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchetcain mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the workclainp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

18. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circularseries around the center, the periphery of the cam having live faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

19, In an attachment of the character stated, the combination with the frame and the work clamp mounted to rcci irocate thereon and to vibrate laterally, of a stud, a ratchet .cani mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, a pawl plate on saidstudarranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole, means for increasing or decreasing the overstitch or the lateral throw of the work clamp, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

20. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, and a pawl platc on said stud arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected .to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole, means for adjusting the y'- brator relative to the stud and needle, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

21. In an attachment of the character stated, the combination with the frame and the wor: clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in .a circular series around the center, the periphery of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a buttonehole, means for adjusting the vibrator relative to thestud and needle, means for regulating the length of the button-hole and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with re spect to the stitching mechanism.

22. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and hav ing a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism adjustable for regulating the length of the button-hole.

23. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form live points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism adjustable for regulating the length of the button-hole.

24. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces 1neeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole,

and means capable of travel in an elliptical path connected with the work clamp for moving the sameback and forth with re spect to the stitching mechanism adjustable for regulating the length of the button-hole.

25. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on. the stud and having a central perforation and ten perforanected with the work clamp for moving the same back and forth with respect to the stitching mechanism adjustable for regulating the length of the button-hole.

26. In an attachment of the character stated, the combination with the frame and the work clamp mounted to reciprocate thereon and to vibrate laterally, of a'stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole, means for increasing or decreasing the overstitch or the lateral throw of the work clamp, and 111621.118 capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism adjustable for regulating the length of the button-hole.-

27. In an attachment of the character described, the combination of a stitching mechanism including a needle, a work clamp, a stud, a cam, a revolving disk, a cam mem her, a driving plate secured to the said cam member, a friction drive for rotating the said cam member, a camming plate provided with slots in line with the major and minor axes of an ellipse mounted on the said stud and working in conjunction with the aforesaid driving plate and revolving disk, the disk being provided with a pivot pin and a cam block operating in the aforesaid slots of the camming plate and cansing the revolving disk to revolve in an elliptical path with respect to the stud and having its major axis in line with the work clamp, and its minor axis disposed transversely thereto, and their intersection located centrally with the stud, the work clamp connected to the revolving disk by the aforesaid cam through means including a yoke member for reciprocating the work clamp in a line relative to the needle, and means for vibrating the work clamp with each stroke of the needle while it is being reciprocated.

28. In an attachment of the character described, the combination of a stitching mechanism including a needle, a work clamp, a stud, a cam, a. revolving disk,a cam memher, a driving plate secured to the said cam member, a friction drive for rotating the said cam member, a. camming plate provided with slots in line with the major and minor axes of an elllipse mounted on the said stud and working in conjunction with the afore' said driving plate and revolving disk, the disk being provided with a pivot pin and a cam block operating in the aforesaid slots of the ca-mming plate and causing the revolving disk to revolve in an elliptical path with respect to the studand having its major axis in line with the work clamp, and its minor axis disposed transversely thereto, and their intersection located centrally with the stud, the work clamp connected to the revolving disk by the aforesaid cam through means of a yoke member for reciprocating the work clamp in a line relative to the needle, means for vibrating the work clamp with each stroke of the needle while it is being reciprocated, and means for slitting the ma-terial'carried by the work clam in advance of the stitching.

29. In an attachment of the character described, the combination of a stitching mechanism including a needle,a. work clamp, a stud, an adjustable cam, a. revolving disk with a shiftable pivot, .a cam member, a driving plate secured to the said cam memher, a friction drive for rotating the said cam member, a c amming plate provided with slots in line with the major and minor axes of an ellipse mounted on the said stud and working in conjunction with the aforesaid driving plate and revolving disk, the disk being provided with a cam block operating in the aforesaid slotsof the camming plate and causing the revolving disk to revolve in an elliptical path with respect to the stud and having its major axis in line with the work clamp, and its minor axis dis posed transversely thereto, and their intersection located centrally with the stud, the work clamp connected to the revolving disk by the aforesaid adjustable cam through means of a yoke member, for reciprocating the W01; clamp in a line relative to the needle and means for vibrating the work clamp with each'stroke of the needle while it is reciprocating.

80. In an attachmentof the character described, the combination of a stitching mechanism including a needle, a work clamp, a stud, an adjustable cam, a revolving disk with a shiftab'le pivot, a cam member, a driving plate secured to the said cam member, a friction drive for rotating the said cam member, a camming plate provided with slots in line with the major and minor axes of an ellipse mounted on the said stud and working in conjunction with the aforesaid driving plate and revolving disk, the disk being provided with a cam block operating in the aforesaid slots of the camining plate and causing the revolving disk to revolve in an elliptical path with respect to the stud and having its major axis in line with the work clamp, and its minor axis disposed transversely thereto, and their intersection located centrally with the stud, the work clamp connected to the revolving disk by the aforesaid adjustable cam through means of a yoke member, for reciprocating the work clamp in a line relative to the needle, means for vibrating the work clamp with each stroke of the needle while it is reciprocating and means for slitting the material carried by the work clamp in advance of the stitching.

3. 1. In an attachment of the character described, the combination of a stitching mechanism including .a needle, work clamp, a stud, an adjustable cam, a revolving disk with a shiftable pivot, a cam member, a driving plate secured to the said cam member, a friction drive for rotating the said cam member, a camming plate provided withslots in line with the major and minor axes of an ellipse mounted on the said stud and working in conjunction with the aforesaid driving plate and revolving disk, the disk being provided with a cam block operating in the aforesaid slots of the ramming plate and causing the revolving disk to revolve in an elliptical path with respect to the stud and having its major axis in line with the work clamp, and its minor axis disposed transversely thereto, and their intersection located centrally with the stud, the work -clamp connected to the revolving disk by the aforesaid adjustable cam through means of a yoke member, for reciprocating the work clamp in a line relative to the dle, and means for vibrating the work clamp with each stroke of the needle while it is re ciprocating, means for slitting the material carried by the work clamp in advance of th stitching, and means for rendering the slitting mechanism ino-perative after the first part of the buttonhole has been stitched.

Signed New York, in the county'of New York and State of New York, this 31st day of December A. D. 1919.

ALBERTUS B. MATTINGLY. 

